Sawmill-dog



(No Model.) 2 Shets-Sheet 1.

P. J. DOYLE, F. E. THRALL & M. B. WILKINSON.

SAWMILL DOG.

No. 473,658. r Patented Apr. 26, 1892.

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(No Model.) 1 2 Sheets-Sheet 2.

P. J. DOYLE, F. E. THRALL 8: M. B. WILKINSON.

SAWMILL DOG. I

N0. 473,658. Patented Apr. 26, 1892.

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"63171355635 Paint/ J Doyle.

UNITED STATES PATENT OFFICE.

PATRICK J. DOYLE, FORREST E. THRALL, AND MARVIN B. WILKINSON, OF ASHEVILLE, NORTH CAROLINA.

SAWMILL-D06.

SPEGIFIGATION forming part of Letters Patent No. 473,658, dated April 26, 1892.

Application filed July 2, 1891. Serial No. 398,309- (No model.)

To all whom it may concern: der and bound by lever K. The upper head Be it known that we, PATRICK J. DOYLE, F slides up and down on bar A, and is held FORREST E. THRALL, and MARVIN B. WVIL- in any position desired by lever H binding it KINsoN,citizens of the United States, residing to bar 0. The steel dog G slides loosely in 5 at Asheville, county of Buncombe, and State head F and can be pushed forward by raisof North Carolina, have invented a new and ing the back end, but is kept in position by useful Sawmill-Dog, to be known as the the pin N, Fig. 3, which is pressed down on Doyle Patent Duplex Mill-Dog, of which top of dog by spiral spring, (shown on Fig. 3,) the following is a specification. thus engaging the notches in lower edge of 10 Our invention relates to improvements in dog with the offset cast in head F, so that the sawmill-dogs whereby the upper and lower dog cannot be moved forward without raising dogs are fastened to the log or cant by one the back end, and when the dog is bound to movement of the lever, and is especially the log this is impossible. adapted to prevent the springing of timber What we claim is I 5 and to quarter-sawing. 1. The combination, with the bar A, slotted Figure 1 is a side view showing the last at the upper end, of the sliding bars B 0, bolts board of a cant as held by the dog. Fig. 2 is connecting the parallel portions of said bars a front view showinglever connections. Fig. and passed through the slots of the bar A, 3 is a sectional view of upper head and dog. having parallel portions and a curve at one 20 Fig. 4 is a bottom view of lower head. Fig. 5 end over the slots of the bar A, and the lever is a view as in use when quarter-sawing. Fig. D, pivoted to the barA and connected to the 6 is a view of main bar. sliding bars to move them simultaneously in Similarletters refer to similar partsthroughopposite directions, and the heads carrying out the several views. dogs, one of which is notched, and operating 25 Main barAis a bar of steel fiveinches wide, means, substantially as described.

three-fourths of an inch thick and five feet 2. The combinatiomwith the barA; slotted long, slot-ted in the upper end, as shown in at the upper end, of the sliding barsB 0, bolts Fig. 6, and is beveled 011 its edges to fit sliding connecting the parallel portions of said bars heads F and I. This bar is readily bolted to and passed through the slots of the bar A,

30 any style of knee. The lever D is pivoted to having parallel portions and a curve at one main bar A and connected with sliding bars end over the slots of the bar A, and the lever B and O by connections shown by dotted lines D, pivoted to the barA and connected to the in Fig. 1. Themovementdownward,or toward sliding bars to move them simultaneously in the operator of lever D, which is held in posiopposite directions, the heads, the screws, the

5 tion by the quadrant E, raises barB and lowdogs, and the levers mounted to bind the dog ers bar 0,130 which the cast-steel heads I and to the head and the heads to the sliding bar F are respectively bound by levers K and H, at one movement, substantially as described.

acting on the screws M. In the lower head P. J. DOYLE. the lever K binds the steel dog J to the head F. E. THRALL. 40 I, and also binds the head I to the bar B by M. B. WILKINSON.

one movement. For plain sawing the lower Witnesses: head is left down, resting on the pin 0 in bar J. MORROW,

B, and the dog .I is pulled back to the shoul- O. Q. ADAMS. 

